Valve mechanism.



JPA'TENTED 001. 22, 1907.

No. 868,745. I

H. WOODS. VALVE MECHANISM. uruoumn FILED saw. 2a. 1906.

a SHEETSSHBET 1.

PATENTED OCT! 22, 1907.

H. WOODS. VALVE MECHANISM. APPLI'OATION FILED 811F128. 190s.

a SHEETS-SHEET 2.

mvsn'ron.

HARRY WOODS, OF STEUBENVILLE, OHIO.

VALVE MECHANISM.

Specification of Letters Patent.

Patented 0ct. 22, 1 907.

Application filed September 23. 1906. Serial No. 336,594.

To all whom it may concern:

Be it known that I, HARRY Woons, of Stcubenville, Jefferson county,Ohio, have invented a new and useful Valve Mechanism, of which thefollowing is a full,

clear, and exact description, rei'erence being had to the accompanyingdrawings, forming part of this specification, in which Figure 1 isaffront elevation partly in section of valve mechanism embodying myinvention, the portion in section being taken on the line II of Fig. 2;Fig. 2 is a section on the line II-II oi Fig. 1; Fig. 3 is a section onthe line Ill-J11 of Fig. 2; Fig. 4 is a section on the line IV-IV ofFig. 2; Fig. 5 is a vertical section through the main valve casing, withthe valve removed, the plane of the section being at right angles to theplane oi section of Fig. 2; Fig. 6 is asectional detail view of the mainvalve; and Fig. 7 shows a modified valve.

My invention has relation to valve mechanism especially designed for usein the control of hydraulic cylinders or other hydraulic mechanism, inwhich the actuating fluid requires to beadmitted to both ends of anactuating cylinder, and is designed to provide a simple and efficientmechanism for this purpose.

With thisobject in view, my invention consists in the novelconstruction, arrangement and combination of parts all substantially ashereinafter described and pointed out in the appended claims.

In the drawings, the numeral 2 designates the main valve casing havingan admission chamber 3 into which leads fromthe bottom of the casing theinlet passage 4.

5 is the valve chamber which is lined with a sleeve or bushing 6,through which extend the several ports now to be described. v

7 and 8 designate respectively the passages or openings in the casing,which are connected to opposite ends of the hydraulic actuating ,devicecontrolled by the valve. The ,port or passage 7 communicates with thevalve chamber 5 by means of the port 7 while the port or passage 8communicates with said chamber by means oi the port 9 which isapproximately ninety degrees from the port 7 i 10 is the exhaiistpassage which communicates with theexhaust passage 11in the valvecasing, said passage 11 communicating with the valve chamber 5 by meansof. the port 12, which is directly opposite the port 8.

13 is themain valve which is seated within the sleeve or bushing G, andis carried by the stem 14.- This valve has a bottom opening 15, whichcommunicates with an annular chamber 16 in the valve body surrounding adiametrically extending transverse port 17.

18 is a port which connects the admission chamber 3, with a balancingchamber 19, situated above the,

upper end of the body of the valve 13. This port 18 'haust, and pressureis admitted to the cylinder 31.

and chamber 19 provide for a balancing pressure at the upper end of thevalve.

The valve body 13 is also provided with a port 20, which leads outwardlyfrom the chamber 16 through its vertical wall. In the position of thevalve shown in Fig. 3, the several ports are closed. When given apartial rotation in one direction, the transverse port 17 of the valvewill connect the port 9 with the exhaust passage 1], and the port 20will connect the chamber 16 with the port of passage 7 leading to oneend of the hydraulic device to be controlled, the exhaust from the otherend of such device being through the ports 8, 9, 17 1]. and 10. When thevalve 13 is turned in the other direction from its closed position, theexhaust port 17 connects the port 7 with the exhaust chamber 11, and theport 20 is connected with the port 9, thereby providing for the reversecirculation of actuating fluid to and from the device which iscontrolled. i i I The valve 13 is preferably actuated by means of apilot valve 13 through a controller now to be described.

The valve stem 14 extends through a gland 22 of a casing 23 and carriesa bevel gear wheel 24 which meshes with a similar but larger wheel 25 onthe controller shaft 26. This controller shaft 26 carries at one end adepending arm or tappet 27, whose free end portion extends between theadjacent ends of opposing plungers 28 and 29 of cylinders 30 and 31.

With the exception of two additional ports presently described, thepilot valve 13, which controls the operation of the plungers '28 and 29is similar to the main valve 13. The casing 2 of this valve isalsosimilar to the casing 2 of the main valve, the port 4 correspondingto the port 4, and the chamber 3 corresponding to the chamber 3, theports 7 B and 8 correspondingto the ports 7 and 8 respectively, the port9 corresponding to the port 9, the exhaust chamber 11 and exhaust port10* corresponding to the chamber 11 and the exhaust port 10; the port 12corresponding to the port 12, and the balancing port 18 and chamber 19corresponding to the balancing port 18 and chamber 19.- The valve hasthe transverse port 17 corresponding to the port 17, and the ports 20and 21 corresponding respectively to the ports 20 and 21. The positionof this valve shown in Fig. 4 corr'esponds to the position of the valve13, as shown in Fig. 3. When turned in one direction .from this positionfluid is admitted from the valve through the ports 20, 9 and 8to theouter end ofthe cylinder 30 through the connecting pipe 33, the outerend of the cylinder 31 being at the same time connected through pipe 34and ports 7, 17 12 and 11" with the exhaust 10. In the other position ofthe valve 13, the cylinder 30 is connected with the ex- The valve 13 isprovided with two additional ports 35 and 36, which in the closedposition of the valve as shown in Fig. 4 connect the chamber 16* thereofwith both ports 7 and 8*, thereby maintaining a pressure in bothcylinders 30 and 31, which serves to lock the controller in the positionto which it has been moved.

The valve 13 is manually actuated by any suitable means, preferably asfollows:Its stem 14 passes upwardly through a gland 38 of a casing 39and carries a bevel gear wheel 40, which meshes with the teeth v ofwheel 41 on a shaft 42, which carries an operating lever 43.

Each of the valve stems 14 and 14 is provided at its upper end and aboveits actuating pinion, with a thrust-bearing 44 with interposedanti-friction members 45. The bearing 44 is adjusted .to set the valveby a screw 46, seated in an arch 47, supported on a bridge piece 48. 49designates lock nuts for locking the screw 46'.

When pressure is admitted to either of the cylinders, 30 or 31, theaction of its plunger against the tappet 27 rotates the shaft 26 andthereby actuates the gears 24 and 25 to turn the valve stem 14 andthereby set the valve 13 in the desired position to which the tappet 27is moved by one of the plungers when operated. It will be apparent thatwhen pressure is admitted to the cylinder 30 to actuate the tappet inthe reverse direction, that the plunger 28 must return the plunger 29 toits original position and force the fluid in the cylinder 31 out throughthe exhaust passages of the pilot valve 13. This is readily done owingto the advantage in leverage which the plunger 28 obtains upon thetappet as contrasted with the opposing resistance of the plunger 29.That is to say, the plunger 38 by reason of its engagement with theupper corner of the end of the tappet has a more effective leveragethereon, in that it is acting through a longer arm, than has the plunger29, which is in contact with the tappet at a point near the shaft 26.When the tappet has been moved to its other position and is to be movedback again by the plunger 29, that plunger has of course asimilaradvantage in leverage. This constitutes an important feature ot'thedevice in its practical operation. I

The valve 13 is also adapted for use as a three-position valve as shownin Fig. 7. In this case it controls but one circulating port 44, theports '9 and 21 being omitted from the bushing 6. In one position of thevalve, the port 20 (corresponding to the port 20) connects the valvechamber 16 with the circulating port 44. In its other position, thetransverse port 17 consesymo nects the said circulating port and theexhaust 1O. 18 is the balancing port.

The advantages of my invention consist in the simplicity of the valvesand in the simple and positive action of the controller. It will be seenthat both in the main valve and in the pilot valve, a single movablemember effects the necessary connections, and that these valves aresimple balanced valves.

Various changes may be made in the details of constructionandarrangement without departing from the spirit and scope of myinvention, since What I claim is:-

1. In valve mechanism, a main valve, gearing for actuating the same, acontroller for actuating the gearing, said controller having actuatingplunger-s, and a pilot valve for controlling the operation of theplunger-s; substantially as described.

2. In valve mechanism of the character described, a main or controllingvalve, gearing for actuating the valve, a controller for actuating thegearing, and cylinders and plungers for operating the controller, and apilot valve for controlling the operation of said cylinders and plungersand for locking the control valve in its several positions;substantially as described.

3. In valve mechanism of the character described, a

. main or controlling, valve, gearing for actuating the same,

a controller for actuating the gearing, said controller hav ing a tappetarm, opposed plungers arranged to act against opposite sides of the saidarm, and a pilot valve for controlling the opcration of the plungers;substantially as described.

4. In valve mechanism, a valve, and a controller therefor consisting ofa shaft having valve actuating gear thereon, and a tappet arm securedthereto, a pair of cylinders having plunger-s arranged to act uponopposite sides of said arm, and means for controlling the action of thecylinders and plungers; substantially as described.

5. In valve mechanism, a controllingdevice having a shaft, :2. tappetarm on the shaft, and opposing plungers arranged to operate uponopposite sides of said tappet arm and having a differential leveragethereon; substantially as described. I

6. In valve mechanism, a valve casing having an inlet port, an exhaustport, and two circulating ports, of a valve body rotatably seated in thecasing, and having a chamber therein communicating with the inlet portof the casing, an outlet port from said chamber arranged to connect saidchamber with the respective circulating ports in different positions ofthe valve, and an exhaust port extending diametrically through the valvebody and arranged to connect the circulating ports with the exhaustport, said valve body also having two additional ports leading outwardlyfrom its chamber and arranged to connect the said chamber with bothcirculating ports in an intermediate position of the valve;substantially as described.

In testimony whereof, I have hereunto set my hand.

HARRY WOODS.

Witnesses:

JOHN MILLER, H. M. CORWIN.

